Unless they are the same memory location! http://underhanded-c.org/_page_id_16.html http://underhanded-c.org/_page_id_16.html x86 CPUs have a dedicated instru

Unless they are the same memory location! http://underhanded-c.org/_page_id_16.html http://underhanded-c.org/_page_id_16.html x86 CPUs have a dedicated instruction to swap two registers, or a register with memory.